Display device

Abstract

An OLED display panel is provided which can control the problem of shedding even in high definition panels. Metal wiring 5 which conducts with an earth line of a flexible printed substrate 15 is provided on a substrate 1 . A display area 2 comprised from a plurality of OLED elements is provided at the center of the substrate 1 and four low resistance metal films 3 are provided along each of four edges of the display area 2 on a surface of insulation films 8, 10 at the periphery of the display area 2 . Among these, one low resistance metal film 3 conducts with the metal wiring 5 via a contact 3 a.

What is claimed is: 
     
       1. A display device comprising:
 a substrate on which a display area including a plurality of pixel elements with a cathode and a peripheral area surrounding the display area are arranged; 
 a wire in the peripheral area; 
 a first insulation layer with a first contact hole in the peripheral area; 
 a first transparent electrode on the first insulating layer and in the first contact hole; 
 a second insulation layer with a second contact hole and in contact with the first insulation layer in the peripheral area; 
 a metal layer on the second insulation layer; 
 a second transparent electrode on the metal layer, wherein 
 the first transparent electrode connects the metal layer to the wire through the first contact hole and the second contact hole, the cathode includes the second transparent electrode, and the display area is arranged along metal layer. 
 
     
     
       2. The display device according to  claim 1 , wherein
 the metal layer, the wire, and the first contact hole overlap with one another. 
 
     
     
       3. The display device according to  claim 2 , wherein
 the wire, the first insulation layer, the second insulation layer, the metal layer and the second transparent electrode are stacked in this order in a cross-sectional view. 
 
     
     
       4. The display device according to  claim 1 , wherein
 both a first edge of the wire facing to an edge of the substrate and a second edge of the wire opposite to the first edge are in the peripheral area. 
 
     
     
       5. The display device according to  claim 1 , wherein
 the pixel elements, the first contact hole, an edge of the first insulation layer, and an edge of the substrate are located in this order.